I would like to voice my support for nuclear power despite having not checked the Japan thread since I evacuated for the (possibility of a) tsunami.
The general populace lacks an understanding of nuclear power and assumes it's bad because of the bombs.
Well, there's little uranium, much of it in unstable countries. It needs to be shipped and refined without escaping into the underworld for use in dirty bombs. It then needs to be used safely for a period, then stored forever, or until reclamation is perfected. It may be very safe, but the consequences of failure at any point are extremely dire.
I personally don't think they are all that dangerous. It's just that the worst case scenario is far more severe than other power sources.
Someone mentioned solar power using molten salt; it's safe, can function 24 hours a day, and doesn't require exotic materials. I like it.
I'm most excited about geothermal. It's cheaper than coal in most places and pretty much can't go wrong. Note that you don't need a volcano; anyplace will work if you go deep enough. So yeah, magma.
Then there's orbital solar. It's expensive for many reasons (to-orbit costs, repair, exotic materials), and it requires large rectennas on the ground. However, in a good orbit, it provides power for all but 8 hours a year and is probably pretty much permanent.